I'm thinking of ordering a Lazyboy cool chair tomorrow. Probably from AVSales as they seem to have a good reputation on here. However, before I take the plunge, can anyone tell me if the built in refridgeration unit makes a hum/buzz like a kitchen fridge? If it does it would probably put me off..... how does it work? I've seen the model without bells and whistles for a few hundred cheaper, so I'm getting hesitant! help!